IEC 62386 203 Edition 1 0 2009 06 INTERNATIONAL STANDARD NORME INTERNATIONALE Digital addressable lighting interface – Part 203 Particular requirements for control gear – Discharge lamps (excluding fl[.]
IEC 62386-203 ® Edition 1.0 2009-06 INTERNATIONAL STANDARD Digital addressable lighting interface – Part 203: Particular requirements for control gear – Discharge lamps (excluding fluorescent lamps) (device type 2) IEC 62386-203:2009 Interface d’éclairage adressable numérique – Partie 203: Exigences particulières pour les appareillages de commande – Lampes décharge (à l'exclusion des lampes fluorescentes) (dispositifs de type 2) LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU NORME INTERNATIONALE THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright © 2009 IEC, Geneva, Switzerland All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information Droits de reproduction réservés Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies About IEC publications The technical content of IEC publications is kept under constant review by the IEC Please make sure that you have the latest edition, a corrigenda or an amendment might have been published Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…) It also gives information on projects, withdrawn and replaced publications IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications Just Published details twice a month all new publications released Available on-line and also by email Electropedia: www.electropedia.org The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages Also known as the International Electrotechnical Vocabulary online Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csc@iec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 A propos de la CEI La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des normes internationales pour tout ce qui a trait l'électricité, l'électronique et aux technologies apparentées A propos des publications CEI Le contenu technique des publications de la CEI est constamment revu Veuillez vous assurer que vous possédez l’édition la plus récente, un corrigendum ou amendement peut avoir été publié Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence, texte, comité d’études,…) Il donne aussi des informations sur les projets et les publications retirées ou remplacées Just Published CEI: www.iec.ch/online_news/justpub Restez informé sur les nouvelles publications de la CEI Just Published détaille deux fois par mois les nouvelles publications parues Disponible en-ligne et aussi par email Electropedia: www.electropedia.org Le premier dictionnaire en ligne au monde de termes électroniques et électriques Il contient plus de 20 000 termes et dộfinitions en anglais et en franỗais, ainsi que les termes équivalents dans les langues additionnelles Egalement appelé Vocabulaire Electrotechnique International en ligne Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csc@iec.ch Tél.: +41 22 919 02 11 Fax: +41 22 919 03 00 LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU IEC Central Office 3, rue de Varembé CH-1211 Geneva 20 Switzerland Email: inmail@iec.ch Web: www.iec.ch IEC 62386-203 ® Edition 1.0 2009-06 INTERNATIONAL STANDARD Digital addressable lighting interface – Part 203: Particular requirements for control gear – Discharge lamps (excluding fluorescent lamps) (device type 2) Interface d’éclairage adressable numérique – Partie 203: Exigences particulières pour les appareillages de commande – Lampes décharge (à l'exclusion des lampes fluorescentes) (dispositifs de type 2) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE PRICE CODE CODE PRIX ICS 29.140.50; 29.140.99 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale U ISBN 2-8318-1040-3 LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU NORME INTERNATIONALE –2– 62386-203 © IEC:2009 CONTENTS FOREWORD INTRODUCTION Scope .6 Normative references .6 Terms and definitions .6 General Electrical specifications Interface power supply .7 Transmission protocol structure Timing Method of operation 10 Declaration of variables 11 Definition of commands 12 Test procedures 13 Annex A (informative) Examples 25 Bibliography 26 Figure – Example of the use of the "Arc Power At Requested Value" bit Figure – Application extended control or configuration command sequence example Figure – Test sequence “Physical selection supported” 14 Figure – Test sequence 'START IDENTIFICATION' 15 Figure – Test sequence 'MAINS VOLTAGE TOO LOW' 16 Figure – Test sequence 'MAINS VOLTAGE TOO HIGH' 17 Figure – 'LAMP VOLTAGE OUT OF SPECIFICATION' 18 Figure – 'QUERY WAITING FOR IGNITION, IGNITION TIME OUT' 19 Figure – 'QUERY CYCLING FAIL' 20 Figure 10 – 'QUERY THERMAL OVERLOAD' 21 Figure 11 – 'QUERY HID STATUS' 22 Figure 12 – 'QUERY EXTENDED VERSION NUMBER' 23 Figure 13 – 'RESERVED APPLICATION EXTENDED COMMANDS' 24 Table - Declaration of additional variables Table – Summary of the application extended command set 13 LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU 62386-203 © IEC:2009 –3– INTERNATIONAL ELECTROTECHNICAL COMMISSION DIGITAL ADDRESSABLE LIGHTING INTERFACE – Part 203: Particular requirements for control gear – Discharge lamps (excluding fluorescent lamps) (device type 2) FOREWORD 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication 6) All users should ensure that they have the latest edition of this publication 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications 8) Attention is drawn to the Normative references cited in this publication Use of the referenced publications is indispensable for the correct application of this publication 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights IEC shall not be held responsible for identifying any or all such patent rights International Standard IEC 62386-203 has been prepared by subcommittee 34C: Auxiliaries for lamps, of IEC technical committee 34: Lamps and related equipment The text of this standard is based on the following documents: FDIS Report on voting 34C/875/FDIS 34C/884/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table This publication has been drafted in accordance with the ISO/IEC Directives, Part LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees) The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”) Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations –4– 62386-203 © IEC:2009 This Part 203 is intended to be used in conjunction with IEC 62386-101 and IEC 62386-102, which contain general requirements for the relevant product type (control gear or control devices) A list of all parts of IEC 62386 series, under the general title Digital addressable lighting interface, can be found on the IEC website The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition; or amended LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU ã ã ã ã 62386-203 â IEC:2009 –5– INTRODUCTION This first edition of IEC 62386-203 is published in conjunction with IEC 62386-101 and IEC 62386-102 The division of IEC 62386 into separately published parts provides for ease of future amendments and revisions Additional requirements will be added as and when a need for them is recognised This International Standard, and the other parts that make up the IEC 62386-200 series, in referring to any of the clauses of IEC 62386-101 or IEC 62386-102, specify the extent to which such a clause is applicable and the order in which the tests are to be performed The parts also include additional requirements, as necessary All parts which make up the IEC 62386-200 series are self-contained and therefore not include references to each other All numbers used in this International Standard are decimal numbers unless otherwise noted Hexadecimal numbers are given in the format 0xVV, where VV is the value Binary numbers are given in the format XXXXXXXXb or in the format XXXX XXXX, where X is or 1; 'x' in binary numbers means 'don't care' LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU Where the requirements of any of the clauses of IEC 62386-101 or IEC 62386-102 are referred to in this International Standard by the sentence "The requirements of IEC 623861XX, clause ’n’ apply”, this sentence is to be interpreted as meaning that all requirements of the clause in question of Part 101 or Part 102 apply, except any which are clearly inapplicable to the specific type of lamp control gear covered by Part 203 –6– 62386-203 © IEC:2009 DIGITAL ADDRESSABLE LIGHTING INTERFACE – Part 203: Particular requirements for control gear – Discharge lamps (excluding fluorescent lamps) (device type 2) Scope NOTE Tests in this standard are type tests Requirements for testing individual control gear during production are not included Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies IEC 62386-101:2009, Digital addressable lighting interface – Part 101: General requirements; System IEC 62386-102:2009, Digital addressable lighting interface – Part 102: General requirements – Control gear Terms and definitions For the purposes of this document, the terms and definitions given in Clause of IEC 62386101:2009 and Clause of IEC 62386-102:2009 apply, with the following additional terms and definitions 3.1 lamp cycling periodic igniting and extinguishing of the lamp 3.2 lamp failure lamp parameter outside of the tolerances for the normal lamp operation NOTE The number of attempts to ignite the lamp parameter before final switching off is control gear dependent 3.3 run-up time time which the system of control gear and lamp(s) needs to set the lamp output power to its nominal lamp power value after switching on the lamp 3.4 waiting for ignition control gear status with ignition function maximal up to the ignition time out without lamp ignition LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU This International Standard specifies a protocol and test procedures for the control of electronic control gear by digital signals used on a.c or d.c supplies, associated with discharge lamps (excluding fluorescent lamps) 62386-203 © IEC:2009 –7– 3.5 ignition time out status of the control gear after an inefficient ignition time NOTE The time is specified by the control gear manufacturer 3.6 arc power at requested value lamp(s) status with the requested arc power General The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply Electrical specifications The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply Interface power supply The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply, if a power supply is integrated with the control gear Transmission protocol structure The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply Timing The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply Method of operation The requirements of Clause of IEC 62386-101:2009 and Clause of IEC 62386-102:2009 apply with the following exceptions: Addition to Clause of IEC 62386-102:2009: 9.9 Arc power at requested value versus fade running If a new arc power level is requested from a stable arc power level situation, the “Fade Running” bit indicates fading from the stable arc power level to the newly requested power level If the fading has been finished and the new arc power level has been reached the “Arc Power At Requested Value” bit indicates whether the arc power is also at the desired value Figure gives an example at given time point t: LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU 62386-203 © IEC:2009 –8– 250 200 180 IEC 626/09 t Arc power level target (control gear) Arc power level (control gear) Fade running Arc power (lamp) Arc power at requested value 250 250 No 250 Yes 200 250 Yes 250 No 200 225 Yes 200 to 250 No 200 200 No 200 to 250 No 180 200 Yes 180 to 250 No 180 180 No 180 to 250 No 180 180 No 180 Yes Figure – Example of the use of the "Arc Power At Requested Value" bit 10 Declaration of variables The requirements of Clause 10 of IEC 62386-102:2009 apply, with the following declaration of additional variables, given in Table LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU 62386-203 © CEI:2009 – 40 – Test PHYSICAL ADDRESS ALLOCATION SEND TWICE BROADCAST RESET SEND SPECIAL COMMAND QUERY SHORT ADDRESS Set the DUT in reset state any reply ? wait (300 ms + Response time) DUT selected? Yes SEND SPECIAL COMMAND PROGRAM SHORT ADDRESS (1) No SEND TO DEVICE TYPE BROADCAST QUERY FEATURES Query the feature byte and store it for later use No time > 10 s ? Yes Message: Physical address allocation not supported by the DUT No answer = 1XXXXXXXb ? physical address allocation supported? Error 4.1.2 "Timeout, no Physical Selection possible" Yes SEND Short Address QUERY CONTROL GEAR SEND TWICE BROADCAST STORE DTR AS SHORT ADDR Remove short address answer = 'YES' ? LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU SEND BROADCAST DTR (255) Test the programming of the short address No Error 4.1.3 "Programming of short address failed" Yes SEND TWICE SPECIAL COMMAND INITIALISE (0) Set INITIALISE SEND SPECIAL COMMAND PHYSICAL SELECTION Set DUT to physical selection mode SEND SPECIAL COMMAND QUERY SHORT ADDRESS DUT selected? any reply ? Yes Error 4.1.1 "DUT selected at beginning of the test" Remove: external stimulus to pose as physical selection Remove the physical selection signal wait (Response time) SEND SPECIAL COMMAND PHYSICAL SELECTION Clear Physical Selection! SEND SPECIAL COMMAND QUERY SHORT ADDRESS DUT selected? No any reply ? Apply: external stimulus to pose as physical selection Simulate the physical selection signal Yes Error 4.1.4 "Command 'PHYSICAL SELECTION' does not clear the selection" No time := SEND BROADCAST TERMINATE Terminate addressing mode SEND BROADCAST DTR (255) SEND TWICE BROADCAST STORE DTR AS SHORT ADDR Remove short address Test done IEC Figure – Séquence d’essais 'Physical address allocation' 628/09 62386-203 © CEI:2009 – 41 – Paragraphe complémentaire: 12.7 Séquences d'essais 'COMMANDES ETENDUES SPECIFIQUES A L'APPLICATION POUR LES DISPOSITIFS DE TYPE 2' 12.7.1 Séquence d'essais 'COMMANDES DE CONFIGURATION ETENDUES SPECIFIQUES A L’APPLICATION ' 12.7.1.1 Séquence d’essais 'START IDENTIFICATION' Les bits de la commande 240 'START IDENTIFICATION' et de la commande 253 'QUERY HID STATUS' sont essayés La séquence d’essais 'START IDENTIFICATION' est représentée la Figure time := SEND TWICE BROADCAST RESET Reset DUT SEND TWICE TO DEVICE TYPE BROADCAST START IDENTIFICATION wait (300 ms + Response time) wait 5s time := Re-trigger identification SEND TWICE TO DEVICE TYPE BROADCAST START IDENTIFICATION SEND TWICE TO DEVICE TYPE BROADCAST START IDENTIFICATION wait 500ms wait 500ms SEND TO DEVICE TYPE BROADCAST QUERY HID STATUS SEND TO DEVICE TYPE BROADCAST QUERY HID STATUS Error (7.2.7.1) "Identification not stopped in s" Error (7.2.7.3) "Re-trigger identification not stopped in s" No No time i M AX ? Yes SEND TO DEVICE TYPE BROADCAST Q UERY HID STATUS G et HID status data Last offset? answer = 0X000XXXb ? No Error (7.6.2.6) "Comm and 253 - Unused bits not reset” Yes Test done IEC Figure 13 – 'COMMANDES ETENDUES SPECIFIQUES A L'APPLICATION RESERVEES' 638/09 62386-203 © CEI:2009 – 51 – Annexe A (informative) Exemples A.1 Attribution des adresses aléatoires L’appareillage est relié une unité de commande qui utilise l’attribution des adresses aléatoires pour le montage du système a) Démarrer l’algorithme avec la commande 258 'INITIALISE', qui autorise les commandes d’adressage pendant une période de 15 c) L’unité de commande cherche l’appareillage ayant le BRN le plus faible l’aide d’un algorithme qui utilise les commandes 264 266 et la commande 260 'COMPARE' L’appareillage ayant le BRN le plus faible est trouvé d) L’adresse courte est programmée sur l’appareillage, trouvée l’aide de la commande 267 'PROGRAM SHORT ADDRESS' e) La commande 268 'VERIFY SHORT ADDRESS' peut être utilisée pour vérifier la programmation correcte f) L’appareillage trouvé doit être retiré du processus de recherche l’aide de la commande 261 "WITHDRAW" g) Répéter les étapes c) f) jusqu’à ce qu’aucun appareillage supplémentaire ne puisse être trouvé h) Arrêter le processus avec la commande 256 "TERMINATE" i) Utiliser la commande 240 "START IDENTIFICATION" avec les adresses courtes programmées et enregistrer l’état de l’appareillage correspondant NOTE Si deux ou plusieurs appareillages ont la même adresse courte, relancer la procédure d’adressage uniquement pour ces appareillages avec la commande 'INITIALISE' (en utilisant l’adresse courte dans le second octet) suivie des étapes b) i) A.2 Attribution des adresses par sélection physique L’attribution des adresses par sélection physique ne doit être utilisée que si tous les appareillages du système supportent cette caractéristique a) Démarrer l’algorithme avec la commande 258 'INITIALISE', qui autorise les commandes d’adressage pendant une période de 15 b) Envoyer la commande 270 ‘PHYSICAL SELECTION’ c) L’unité de commande doit répéter la commande 269 'QUERY SHORT ADDRESS' périodiquement jusqu’à ce qu’un appareillage réponde (cet appareillage est sélectionné physiquement) d) L’adresse courte est programmée sur l’appareillage, choisie commande 267 "PROGRAM SHORT ADDRESS" e) Envoyer la commande 240 'START programmées pour un contrôle visuel f) IDENTIFICATION' aux Répéter les étapes b) e) pour tous les appareillages restants g) Arrêter le processus avec la commande 256 'TERMINATE' l’aide adresses de la courtes LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU b) Envoyer la commande 259 'RANDOMISE'; tous les appareillages choisissent un nombre binaire aléatoire (BRN, Binary Random Number), de telle sorte que 24 ≤ BRN ≤ + −1 62386-203 © CEI:2009 – 52 – Bibliographie [1] CEI 60598-1, Luminaires – Partie 1: Exigences générales et essais [2] CEI 60669-2-1, Interrupteurs pour installations électriques fixes domestiques et analogues – Partie 2-1: Prescriptions particulières – Interrupteurs électroniques [3] CEI 60921, Ballasts performances [4] CEI 60923, Appareillages de lampes – Ballasts pour lampes décharge (à l’exclusion des lampes tubulaires fluorescence) – Exigences de performance [5] CEI 60925, Ballasts électroniques alimentés en courant continu pour lampes tubulaires fluorescence – Prescriptions de performance [6] CEI 60929, Ballasts électroniques alimentés en courant alternatif pour lampes tubulaires fluorescence – Exigences de performance [7] CEI 61347-1, Appareillages de lampes – Partie 1: Exigences générales et exigences de sécurité [8] CEI 61347-2-3, Appareillages de lampes – Partie 2-3: Prescriptions particulières pour les ballasts électroniques alimentés en courant alternatif pour lampes fluorescentes [9] CEI 61547, Equipements pour l'éclairage usage général – Prescriptions concernant l''immunité CEM [10] CEI 62034, Système automatique de tests pour éclairage de sécurité sur batteries [11] CISPR 15, Limites et méthodes de mesure des perturbations radioélectriques produites par les appareils électriques d'éclairage et les appareils analogues [12] GS1, General Specification: Global Trade Item Number, Version 7.0, publiée par GS1, Avenue Louise 326; BE-1050 Bruxelles, Belgique; et GS1, 1009 Lenox Drive, Suite 202, Lawrenceville, New Jersey, 08648 USA pour lampes tubulaires fluorescence – Exigences de LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU _ LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU ELECTROTECHNICAL COMMISSION 3, rue de Varembé PO Box 131 CH-1211 Geneva 20 Switzerland Tel: + 41 22 919 02 11 Fax: + 41 22 919 03 00 info@iec.ch www.iec.ch LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU INTERNATIONAL